Luke 2:37
and had been a widow about eighty four years; who departed not from the temple; serving God with fastings and prayers night and day.
Acts 10:30
And Cornelius said, Four days ago I was fasting till this hour, and at the ninth hour I was praying in my house, when behold a man stood before me in bright raiment,
James 4:8-10
Draw near to God, and He will draw near to you: cleanse your hands, O sinners, and purify your hearts, ye double minded.
James 5:16-18
Confess your faults one to another, and pray for one another, that ye may be healed: the fervent prayer of a righteous man availeth much.